Introduction to Unit Testing

Ethereum Smart Contract Programming 201
#157

I really appreciate all of your help. Man. Thanks.

Here is the abi:

var abi = [
    {
      "constant": true,
      "inputs": [],
      "name": "getMessage",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "internalType": "string",
          "name": "newMessage",
          "type": "string"
        }
      ],
      "name": "setMessage",
      "outputs": [],
      "payable": true,
      "stateMutability": "payable",
      "type": "function"
    }
  ]
1 Like
#158

Hey @NeoKanoPheus

In your ABI I do not see the function createPerson()

I see only getMessage() and setMessage()

Take the correct ABI and try again :slight_smile:

You can find the abi into your project folder > build > contracts

Keep me updated
Dani

1 Like
#159

Duly noted.
Thank you very much

1 Like
#160

How do I downgrade the node?

#161

Same problems on linux

image
image721×752 59.5 KB

solved it by installing NVM and changed NODE.JS V12.18.1 ==> V10.18

then it worked

image
image549×537 27.9 KB

#162

Hey @elterremoto

Check this FAQ: FAQ - How to downgrade Node.Js

Cheers,
Dani

2 Likes
#163

Hello,

I had error ERR_INVALID_REPL_INPUT after running test

so I followed these instructions.

After that I have a new error:

Compiling your contracts...
===========================
Error: TypeError: Error parsing C:/Users/enrico/Desktop/coding/truffle/helloworld/contracts/Migrations.sol: Cannot destructure property 'body' of 'undefined' as it is undefined.
    at Object.compile (C:\Users\enrico\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\workflow-compile\legacy\index.js:80:1)

The Helloworld contract was not modified (before it was migrating it normally).

Do you have any idea how to fix this? thanks

#164

@filip

Trying to run “test” in truffle console. Getting this message:

TypeError [ERR_INVALID_REPL_INPUT]: Listeners for uncaughtException cannot be used in the REPL

Any advice?

I found this thread which I think is about this issue, but not sure what to do: https://github.com/trufflesuite/truffle/issues/2463

1 Like
#165

Hey @enrico

Check this FAQ: FAQ - How to downgrade Node.Js

Let me know if that fixes the issue.

Cheers,
Dani

1 Like
#166

Slavenr’s solution worked for me!

1 Like
#167

@Karolis_Abramavicius Thank you so much… This was very easy to follow and helps a lot! :+1: :hugs:

1 Like
#168

I had to downgrade node js from 12 to 10.16.0.

Here’s the link on how to change versions if your’e on a Mac.

https://stackoverflow.com/questions/47008159/how-to-downgrade-node-version

1 Like
#169

Can anyone help me with this error when i run the test?

helloworld.sol

pragma solidity 0.5.12;

contract Helloworld {
  string message = "Hello World!";

  function getMessage() public view returns (string memory) {
    return message;
  }
  function setMessage(string memory newMessage) public payable {
  message = message;
  }
}

//Helloworld_Deploy.js

const Helloworld = artifacts.require("Helloworld");

module.exports = function(deployer, network, accounts){
  deployer.deploy(Helloworld).then(function(instance){
      instance.setMessage("Hello Again!", {value: 1000000, from: accounts[0]}).then(function(){
        console.log("Success");
      }).catch(function(err){
        console.log("error: " + err);
      });
  }).catch(function(err){
    console.log("Deploy failed " + err);
  });
};

//initial migration

const Migrations = artifacts.require("Migrations");

module.exports = function(deployer) {
  deployer.deploy(Migrations);
};

//Helloworld.js

const Helloworld = artifacts.require("Helloworld");

contract("Helloworld", async function(){
  it("should initialize correctly", async function(){
    let instance = await Helloworld.deployed();
    let message = await instance.getMessage();
    assert(message === "Hello Again!");
  });
});

test
test1244×1396 332 KB

Not sure if i can go further until i figure this error out.

Thanks chaps.

Rob.

1 Like
#170

Hey @Rob_McCourt

You have a warning and an error:

warning:
The parameter string memory message is not used and can be removed.

error
This is related to the Node version installed.
Click this link and follow the guide to downgrade it:
https://forum.ivanontech.com/t/faq-how-to-downgrade-node-js/22908/2

let me know,
Dani

#171

works perfectly thanks…

1 Like
#172

Could somebody please tell me what’s going on here? I don’t understand the error. I’ve looked over and over again at the code from the video and I cannot figure out what’s wrong. Thank you.

Untitled
Untitled1366×768 124 KB

#173

What was the last command?

1 Like
#174

Hey @mburtonshaw

From your screenshot it seems the tx failed due to a revert statement.
I am not able to provide more info as I need a bit of context.
Which function were you calling?
Also as @Rob_McCourt suggested, what was the last command you sent?

Cheers,
Dani

1 Like
#175

@Rob_McCourt @dan-i
I entered “truffle console” and then “test”. I may have entered “migrate” before “test” but I don’t think I did

#176

CMDERROR1117
CMDERROR1117980×527 28.9 KB

After running Test I keep receiving this error

1 Like